Traffic dropped inter vlan interface same "physical" interface Forrtigate VM

[danto]

Hi,

I am experiencing traffic loss from the interfaces (vlan subinterfaces) .

For example I have Interface vlan3333 and vlan 3334 in the same parent interface (port8) in Fortigate VM. As soon as traffic flows from vlan3333 to vlan3334 I am encountering packet loss. The physical interface (port8) also drops packets, it's like the whole interface is affected by this.

I've changed the vlans, I've chenged the parrent interface,  I even downgraded from 5.4.1 to 5.2.2.

What is happening? I've never encountered this with a physical box

[Nils]

Have you verified that the speed on the interface is correct?

What equipment do you have on the other side?

[danto]

The speed on the interface is auto, and you cannot change it. It is negociated at 10 Gbps, is virtual.

The VM is on a UCS server

[MikePruett]

Silly question but you do have policy in place to allow traffic to flow from one vlan to the other correct?

[danto]

Yes,

Traffic is flowing, it is just dropping traffic, packet loss. 

Reply from 10.101.0.14: bytes=32 time=3ms TTL=59 Reply from 10.101.0.14: bytes=32 time=3ms TTL=59 Request timed out. Request timed out. Request timed out. Reply from 10.101.0.14: bytes=32 time=1ms TTL=59 Reply from 10.101.0.14: bytes=32 time=2ms TTL=59

It is like it cannot handle the traffic, and right now there isn't much, just a couple of pings.

If I move the Vlan interface from one port to another on Fortigate, traffic works just fine.